It's one of the primary boxes in my test lab, been running 2.0 on it all year. It maxes out at around 250 Mbps, 100 Mb between VLANs won't phase it, but if you're using multiple gig links with fast boxes on them that can push serious traffic, you can peg it.
Solid box, and since Netgate is offering it and they take care of us, you can be sure it'll always work with our releases or there will be documented solutions if something is a bit unusual. such as:
http://doc.pfsense.org/index.php/Full_install_on_Netgate_Hamakua